From 6a2de22f6babafd609b9356cdb0979eb5bb10564 Mon Sep 17 00:00:00 2001 From: Christoph Hellwig Date: Fri, 25 Nov 2016 09:07:48 +0100 Subject: [PATCH] btrfs: don't access the bio directly in the direct I/O code Just use bio_for_each_segment_all to iterate over all segments. Signed-off-by: Christoph Hellwig Reviewed-by: Omar Sandoval Signed-off-by: David Sterba --- fs/btrfs/inode.c | 7 +++---- 1 file changed, 3 insertions(+), 4 deletions(-) diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c index 0b836737d382..c96d94ef846d 100644 --- a/fs/btrfs/inode.c +++ b/fs/btrfs/inode.c @@ -8334,7 +8334,7 @@ static int btrfs_submit_direct_hook(struct btrfs_dio_private *dip, struct btrfs_root *root = BTRFS_I(inode)->root; struct bio *bio; struct bio *orig_bio = dip->orig_bio; - struct bio_vec *bvec = orig_bio->bi_io_vec; + struct bio_vec *bvec; u64 start_sector = orig_bio->bi_iter.bi_sector; u64 file_offset = dip->logical_offset; u64 submit_len = 0; @@ -8343,7 +8343,7 @@ static int btrfs_submit_direct_hook(struct btrfs_dio_private *dip, int async_submit = 0; int nr_sectors; int ret; - int i; + int i, j; map_length = orig_bio->bi_iter.bi_size; ret = btrfs_map_block(root->fs_info, btrfs_op(orig_bio), @@ -8373,7 +8373,7 @@ static int btrfs_submit_direct_hook(struct btrfs_dio_private *dip, btrfs_io_bio(bio)->logical = file_offset; atomic_inc(&dip->pending_bios); - while (bvec <= (orig_bio->bi_io_vec + orig_bio->bi_vcnt - 1)) { + bio_for_each_segment_all(bvec, orig_bio, j) { nr_sectors = BTRFS_BYTES_TO_BLKS(root->fs_info, bvec->bv_len); i = 0; next_block: @@ -8427,7 +8427,6 @@ next_block: i++; goto next_block; } - bvec++; } } -- 2.20.1